JP2007188600A - Disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk device in which a disk is loaded easily and in a way with a high degree of freedom. <P>SOLUTION: A centering part 8 abutted on the outer periphery of a disk 4 and moving the center of a disk 4 so as to be aligned with the center of a turntable 1 is constituted of a pair of centering members 8a or more passing through the center of the turntable 1 and abutted on the disk symmetrically centering a first plane being orthogonal to the disk placing plane of the turntable. It is provided to a chassis 7 mounting a traverse base 5, and when the disk 4 is placed at a free position within the prescribed range on a tray 3, after the tray 3 is pulled into the disk device and stopped, the center of the disk 4 is automatically shifted so as to be aligned with the center of the turntable 1 by the centering part 8. Thereby, it is not necessary to finely position the disk 4 for loading, and loading can be facilitated. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a disk device for mounting a recording or reproducing disk such as a CD (Compact Disk) or a DVD (Digital Versatile Disk) and recording or reproducing various information signals on the disk.

  In recent years, it is called “DVD recorder” that can record and play back video and audio signals on DVD, but the product has begun to spread rapidly, but for further expansion in the future, it is used by anyone such as universal design. There is a need to develop disk devices that are easier to use and more user-friendly.

  In a conventional disk device, a tray method is generally used as a method for mounting a disk on the device. In the tray method, a tray on which a disk can be placed is provided so as to be movable between the inside and outside of the apparatus. When the tray is located outside the apparatus, the disk is placed on the tray, and then the tray is By pulling it into the apparatus, the disk can be mounted on the disk apparatus.

  A conventional disk device will be described below. Conventionally, a disk device described in Patent Document 1 is known.

  The disk device disclosed in Patent Document 1 is provided with an opening for inserting and removing a tray on a front panel of a disk-using device, and after the disk is placed on the tray drawn out from the opening, the disk is placed inside the apparatus together with the tray. It is comprised so that it may be drawn in to a predetermined position (attachment / detachment position to a turntable).

  On the tray, there is a positioning recess formed by shaping the outer shape of the large-diameter and small-diameter discs. When the disc is placed in the positioning recess, the disc is placed when the tray is pulled into the apparatus. It is configured so that the center of the is aligned with the center of the turntable.

Then, when the disc is mounted on the turntable and the disc is sandwiched between the clamper and the disc mounting surface of the turntable and rotated at a predetermined number of revolutions, for example, when reproducing, the disc is placed on the disc. The recorded information signal can be reproduced by a recording / reproducing apparatus such as an optical pickup. That is, the information signal is reproduced by moving the pickup for reading the signal according to the track position of the signal recorded in a predetermined range on the disc.
JP-A-6-251479

  However, in the above-described conventional configuration, when the disk is placed on the tray, it is necessary to position and place the disk in a positioning recess provided on the tray, which reduces usability.

  When the disc is placed on the tray without being positioned in the positioning recess and pulled into the apparatus, the disc center cannot be fitted to the turntable center at the clamp position, so the disc cannot be mounted on the turntable. .

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described conventional problems, and to provide a disk device that can be easily mounted in a disk device and can be performed with a high degree of freedom.

  In order to achieve the above object, an image pickup apparatus according to the present invention is a disk apparatus capable of recording or reproducing information signals with respect to a disk, and has a disk mounting portion on which the disk can be mounted. Between the disk mounting position where the mounting part is located outside the apparatus and the disk clamping position where the disk mounting part is positioned inside the apparatus and the disk mounted on the disk mounting part can be clamped A movable tray, an optical pickup for recording / reproducing information signals with respect to the disc, and the disc at a position where the disc is placed and the optical pickup can record and reproduce information signals with respect to the disc. A traverse base mounted with a rotating turntable and arranged to be movable between a recording / reproducing position and a standby position, and the traverse base And holding the disk to a position where the center of the disk and the center of the turntable coincide with each other, and a chassis that movably supports the traverse base in the opening. A centering member that passes through the center of the turntable and intersects the disk mounting surface of the turntable at a right angle, and the center of the turntable passes through the first plane. A pair of symmetrically abutting on the disc about the second plane intersecting at right angles with each other, symmetrically about the first plane, and rotating symmetrically about the second plane, respectively. It is configured to be movable, and a rib is disposed on the disk mounting portion of the tray. The height of the rib in the vertical direction is such that the tray is at the disk clamp position. In state, the low in the vicinity of the turntable, and is formed by gradually increasing according to the direction from the turn around the table outside the disk radial direction.

  According to the imaging apparatus of the present invention, it is possible to obtain an excellent effect that the disk can be easily mounted on the disk apparatus and can be performed with a high degree of freedom.

  In the disc apparatus of the present invention, the centering means is configured to abut against the disc symmetrically about a second plane passing through the first plane and the center of the turntable and intersecting the first plane at a substantially right angle. A pair of the centering members may be provided symmetrically about the first plane, and each centering member may be configured to rotate symmetrically about the second plane. .

  The first plane may be a plane including an optical pickup optical axis and a center axis of the turntable.

  Further, the rib may be arranged in parallel to the moving direction of the optical pickup.

  In addition, a clamper held by a clamp holder is disposed at a portion facing the turntable, and the disc can be sandwiched between the turntable and the clamper. The clamp holder supports the traverse base. In the vicinity of the position facing the shaft, it is pivotally supported between a separation position where the clamper and the turntable are separated from each other and a coupling position where they can be coupled to each other, and protrudes in the direction in which the traverse base is disposed. A first rib is provided, and the traverse base includes a second rib that can come into contact with the first rib when the traverse base is at the recording / reproducing position. The clamp holder is rotated so that the clamper can be coupled to the turntable by bringing the rib and the second rib into contact with each other. It may be configured to.

(Embodiment 1)
[1. Basic configuration]
FIG. 1 is a perspective view of a disk device according to Embodiment 1 of the present invention when a disk can be loaded. Here, the “disc mountable state” is a state of the apparatus when the user can place a disc on the tray. In the following description, the position of each component when the apparatus is in a disk mountable state may be referred to as a “disk mount position”.

  FIG. 2 is a perspective view of the disk device at a clamp position. Here, the “clamped state” is a state where the tray has moved to a position where the disk is clamped to the turntable. The tray is configured to move between the disk placement position and the clamp position. In the following description, the position of each component when the apparatus is in a clamped state may be referred to as a “clamp position”.

  3 is a cross-sectional view when the disk device is in a clamped state, and is a cross-sectional view taken along the line V-V in FIG. FIG. 4 is a perspective view of the disk device in the centering completion state of the disk, and FIG. 5 is a perspective view of the disk device in the recording / reproducing state. FIG. 6 is a cross-sectional view of the disk device in the recording / reproducing state, which is a cross-sectional view taken along the line WW in FIG.

  As shown in FIGS. 1 to 6, the disk device of the present embodiment mainly includes a turntable 1, an optical pickup 2, a tray 3, a traverse base 5, a guide shaft 6, a chassis 7, The centering unit 8 is composed of a clamper 9 and a clamp holder 10.

  The turntable 1 has a substantially disk shape and includes a disk mounting surface on which a disk 4 can be mounted. The disk 4 can be mounted on the disk mounting surface of the turntable 1 and the disk 4 can be rotated by holding the disk 4 together with a clamper 9 (described later). The turntable 1 is rotationally driven by driving means (not shown) such as a motor.

  The optical pickup 2 can irradiate the information layer of the disk 4 with laser light, record a video signal or the like on the information layer, and read information recorded on the disk 4.

  The tray 3 can be loaded with a disk 4 on its main surface and is movably provided in the Y direction or the opposite direction. The tray 3 is driven by driving means such as a motor, a gear, and a rack (all of which will be described later). Further, the tray 3 is provided with a disk mounting surface 3a, ribs 3b, openings 3c, and walls 3d.

  The disc placement surface 3a is a surface on which the disc 4 is placed by the user.

  The rib 3b is erected in the vicinity of the opening 3c on the disk mounting surface 3a. Further, the rib 3b is configured such that the upper surface thereof is curved so that the height in the vicinity of the opening 3c is lowered as shown in FIG. With this configuration, when the disk 4 (large diameter or small diameter) is placed on the disk placement surface 3 a, the rib 3 b receives the vicinity of the outer peripheral edge of the disk 4, and the disk placement surface 3 a of the disk 4. It is possible to prevent the surface (the recording surface in the case of a CD or DVD) from contacting the disk mounting surface 3a and being scratched or soiled. In the present embodiment, the rib 3b is formed in parallel to the moving direction of the optical pickup 2 (Y direction or the opposite direction) as shown in FIG. Further, in the present embodiment, the ribs 3b are provided at two places on the left and right sides with an opening 3c (described later) interposed therebetween. The distance between the left and right ribs 3b is set at a distance that is at least narrower than the diameter of the small diameter disk so that the small diameter disk does not enter between the two left and right ribs. The length of the rib 3b in the longitudinal direction is set to be longer than at least the outer diameter of the large-diameter disc with the turntable 1 as the center in the recording / reproducing state. Further, as shown in FIG. 3, the height of the rib 3b with respect to the disk mounting surface 3a is formed so as to be the lowest in the vicinity of the turntable 1, and is increased in the longitudinal direction so as to increase toward the radially outer side of the disk. It is formed so that the vicinity of both ends of the plate is the highest. And the shape when the rib 3b is seen from the side surface is a continuous substantially circular arc shape as shown in FIG. 3 in this Embodiment. The shape is not limited to the arc shape, and may be any shape as long as it is lowest at least near the center. For example, the shape may be substantially V-shaped. The width of each rib 3b may be a dimension that can reduce the contact area with the disk 4 as much as possible. For example, the shape of the top of the rib 3b may be sharpened.

  The wall portion 3d is provided with a wall portion 3d at the end of the disc placement surface 3a of the tray 3, and a certain amount of the disc placement position when placing the disc 4 in the X and Y directions. The position is regulated, and the user may freely place the disk 4 within the range surrounded by the wall 3d.

  The disk 4 (information medium) is a disc-shaped information medium such as a CD or a DVD. In this apparatus, a large-diameter disk and a small-diameter disk can be mounted as the disk 4.

  The traverse base 5 is rotatably disposed in the opening 7b in the chassis 7, and the turntable 1 and the optical pickup 2 are mainly mounted thereon. The traverse base 5 is rotatably arranged around the support shaft 5a by a driving means (not shown) such as a motor or a gear so as to rotate between a standby position and a recording / reproducing position. Is provided. Here, the “standby position” refers to a state in which the tray 3 is pulled into the disk device as shown in FIG. 3, and the disk placement surface of the turntable 1 and the optical pickup 2 from the upper surface of the rib 3 b of the tray 3. It is a position where it does not protrude (that is, a position located below the upper surface of the rib 3b). As shown in FIG. 6, the “recording / reproducing position” is a position where the disk mounting surface of the turntable 1 protrudes upward from the rib 3b of the tray 3 and the disk 4 can be mounted and recorded / reproduced. It is. Further, as shown in FIG. 3, a rib 5 e that is curved in a direction substantially perpendicular to the main surface is provided in the vicinity of the support shaft 5 a of the traverse base 5. The drive means for rotating the traverse base 5 will be described later.

  The guide shaft 6 is composed of two support shafts parallel to each other, and is fixed in an opening 5 b provided in the traverse base 5. The guide shaft 6 supports both ends of the optical pickup 2 and guides it when moving in the radial direction of the disk 4.

  The chassis 7 is mounted with a tray 3, a traverse base 5, a centering portion 8, and the like. In addition, the chassis 7 has an opening 7b formed substantially at the center of the main surface, and the traverse base 5 is held by the support shaft 5a in the opening 7b. The chassis 7 includes a driving means (not shown) for rotating the traverse base 5 between the standby position and the recording / reproducing position about the support shaft 5a, and a driving means (not shown) for driving the tray 3. It also has. A top cover 7 a is attached on the chassis 7 so as to cover the upper portion of the chassis 7.

  The centering unit 8 moves the disk 3 on which the disk 4 is placed into the disk device and stops (state shown in FIG. 2), so that the center of the disk 4 is aligned with the center of the turntable 1. Is to move. In the present embodiment, the turntable 1 in the recording / reproducing state is centered on four sets of centering members 8a and support shafts 8e symmetrically in the vertical and horizontal directions, and the central axis of the turntable 1 and the optical pickup 2 in the recording / reproducing state. And a second plane passing through the center of the turntable 1 and intersecting the first plane at a substantially right angle with the disk 4 symmetrically.

  The centering member 8a supports the outer peripheral portion of the disk 4 mounted on the disk mounting surface 3a of the tray 3 at four locations, and transports the disk 4 in the centering direction. The centering member 8a may support and transfer a portion other than the outer peripheral portion of the disk 4 mounted on the disk mounting surface 3a of the tray 3. The centering member 8a has a first position (FIGS. 1, 2 and 5) in a standby state and a second position (FIG. 4) where the disk 4 is supported and moved to the centering position. It can be turned around the support shaft 8e in the direction of arrow A or B so that it can be moved between them.

  Since the support shaft 8e is provided in the chassis 7 and can improve the accuracy of the mounting position with respect to the turntable 1, the centering accuracy of the disk 4 with respect to the turntable 1 can be increased.

  A method for driving the centering member 8a will be described later. As will be described in detail later, gears are provided at the ends of the support shafts 8e, and the gears are arranged around the support shafts 8e. Since the gears of the paired centering members 8a mesh with each other, the paired centering members 8a are configured to rotate at the same timing. Further, an internal mechanism is configured so that the two paired centering members 8a rotate at the same timing. The centering member 8a is configured to have a length capable of scooping up the large-diameter disk and the small-diameter disk mounted on the disk mounting surface 3a of the tray 3 by rotating. Further, the centering member 8a has a configuration for stopping the rotation operation at the centering position. The configuration includes a configuration in which the centering member 8a is brought into contact with a stopper (not shown) and a slip unit (see FIG. (Not shown) is provided so that the driving force is not transmitted to the support shaft 8e. In this embodiment, it is possible to mount a large-diameter disk and a small-diameter disk. For example, when centering a large-diameter disk, the centering member is stopped by a slip mechanism and when a small-diameter disk is centered, a stopper is used for centering. The structure which stops rotation of a member can be considered. Alternatively, only the slip mechanism may be provided, and the rotation of the centering means may be stopped by the slip mechanism for all the disks. The means for stopping the rotation operation of the centering member 8a in this way is hereinafter referred to as “rotation stop means”.

  The clamper 9 clamps the disk 4 on the disk mounting surface of the turntable 1. The clamper 9 is loosely fitted to the clamp holder 10 so as to be movable in the vertical direction (Z direction) of the disk mounting surface of the turntable 1.

  The clamp holder 10 holds a clamper 9 and is disposed so as to be rotatable between a clamp standby position and a clamp position about a support shaft 10a. Further, the support shaft 10a is supported by the top cover 7a. As shown in FIG. 3, the clamp standby position is set to a position that does not contact the tray 3 moved into the disk device and the disk 4 mounted on the disk mounting surface 3a. The clamp position is such that the clamp holder 10 rotates in the C direction from the position of FIG. 3 to the position shown in FIG. 6 around the support shaft 10a, the clamper 9 fixes the disk 4 to the turntable 1, and the clamp The position is set so that the holder 10 does not contact the disk 4. A method for rotating the clamp holder 10 will be described later. Further, the clamper 9 has a magnetic body and is configured to be attracted by a magnetic force to a magnetic body disposed on the disk mounting surface of the turntable 1. Further, the clamp holder 10 is always urged by an elastic member such as a coil spring so as to be positioned at the retracted position shown in FIG. Further, a rib 10b that is curved in a substantially vertical direction is provided at the rear end in the longitudinal direction of the clamp holder 10. The rib 10b has a dimension capable of contacting at least the rib 5e of the traverse base 5.

[2. Disc attachment / detachment operation]
[2-1. basic action]
First, when a tray open / close switch (not shown) provided on the front surface of the disk device is operated by a user, the motor 41 starts driving, and the driving force is applied to the back surface of the tray 3 via the relay gear 42. It is transmitted to the formed rack 3e. As a result, the tray 3 is pulled out in the Y direction from the inside of the disk device, and the state shown in FIG. 1 is obtained. The user places the disc 4 at an arbitrary position within the range surrounded by the wall 3d on the disc placement surface 3a. At this time, the lower surface (recording surface) of the disk 4 is received by the rib 3b. The drive means for transferring the tray 3 composed of the motor 41, the relay gear 42, and the like is referred to as “first drive means”.

  Next, when the tray open / close switch (not shown) is operated again, or when a recording / reproduction start switch (for example, a reproduction start button or a recording start button) is operated, the motor 41 moves in the opposite direction to that in the aforementioned drawer operation. The tray 3 is pulled into the disk device, and the state shown in FIGS. 2 and 3 is obtained.

  The centering unit 8 retreats to a position where it does not overlap the Z-direction projection surface of the disk mounting surface 3a when the tray 3 is pulled into the disk device except when the disk 4 is centered. (See, for example, FIG. 7). Further, when the tray 3 is pulled out of the disk device or out of the device, the clamp holder 10 and the clamper 9 do not come into contact with the tray 3 as shown in FIG. Furthermore, it is retracted upward in the Z direction. Further, the turntable 1 and the optical pickup 2 are retracted downward in the Z direction by rotation of the traverse base 5 so as not to contact the disk 4.

  Next, in FIGS. 2 and 3, the motor 30 starts driving, and the relay gear 31 connected to the output shaft of the motor 30 is rotated, so that the first rack 16 and the second rack 17 move. To start. The drive means that is composed of the motor 30, the first rack 16, the second rack 17 and the like and drives the traverse base 5 is called “second drive means” and is a specific example of the second drive means. The detailed operation will be described later. When the first rack 16 and the second rack 17 move, the driving force is transmitted to a gear portion (described later) provided on the support shaft 8e of the centering portion 8, and the four centering members 8a are respectively connected to the support shaft. Simultaneously rotate in the direction of arrow A about 8e. As shown in FIG. 4, the centering member 8a comes into contact with the outer periphery of the disk 4 and the edge of the disk 4 slides on the disk contact surface of the centering member 8a as the centering member 8a continues to rotate. The center of 4 is moved to a position that matches the center of the turntable 1.

  When the disk 4 reaches the centering completion position shown in FIG. 4, the centering member 8a stops the rotation operation by the rotation stop means. The rotation stopping means is provided so as to stop at the centering position where the center of the disk 4 moved by the centering member 8 a matches the center of the turntable 1. Note that the second driving means continues to drive.

  Next, as shown in FIG. 3, the traverse base 5 starts to rotate around the axis of the support shaft 5a in the direction of arrow E by the second driving means that continues to drive, and the turntable 1 opens the opening 3c. It is inserted and moved to the recording / reproducing position shown in FIG. At this time, the disc 4 is lifted by placing the projection of the turntable 1 in the center hole thereof and placing it on the disc mounting surface. Further, when the traverse base 5 is rotated, the rib 5e presses the rib 10b of the clamp holder 10 in the direction of arrow E, and the clamp holder 10 is rotated in the direction of arrow C against the elastic force of the elastic member. .

  Next, as shown in FIG. 6, when the traverse base 5 and the clamp holder 10 are rotated to the position shown in FIG. 6, the clamper 9 is attracted to the disk placement surface of the turntable 1 by the magnetic force, and the disk 4 is It is clamped by the turntable 1 and the clamper 9. At this time, the second driving means continues to drive.

  In the present embodiment, the clamp holder 10 is pressed by the traverse base 5 after the pull-in operation of the tray 3 into the disk device is completed and the disk 4 is centered at the center of the turntable 1 to be clamped. However, the clamp holder 10 may be configured to rotate in the direction of arrow C simultaneously with the drawing operation of the tray 3 into the disk device. In this case, for example, a part of the clamp holder 10 is brought into contact with the tray 3 during the pulling operation, and the clamp holder 10 is rotated in the direction of arrow C.

  Next, as shown in FIG. 5, the centering member 8 a is rotated in the direction of arrow D by the second driving means that continues to drive, and is separated from the outer periphery of the disk 4 placed on the turntable 1. Retreat to position. The centering member 8a may be retracted to any position as long as it is separated from the outer periphery of the disk 4 mounted on the turntable 1. In the present embodiment, the centering member 8a is moved to the first position shown in FIG.

  In the state shown in FIG. 5, the disk 4 is held by the turntable 1 and the clamper 9. Then, information can be recorded / reproduced with respect to the disk 4 while rotating the turntable 1 to rotate the disk 4 and moving the optical pickup 2 in the radial direction of the disk 4.

  In the present embodiment, the clamp base 10 is configured to rotate simultaneously with the rotation of the traverse base 5, but the timing may be shifted, for example, after the rotation of the traverse base 5 is completed. It is good also as a structure which turns.

  Next, an operation for taking out the disk 4 from the disk device will be described.

  When the disk ejecting switch (not shown) is operated while the disk 4 shown in FIGS. 5 and 6 is in the recording / reproducing state, the rotation of the turntable 1 is stopped and the rotation of the disk 4 is stopped.

  Next, the motor 30 shown in FIG. 6 is operated to operate the first rack 16 and the second rack 17 via the relay gear 31. When the first rack 16 and the second rack 17 are operated, the centering member 8a shown in FIG. 5 supports the outer periphery of the disk 4 as shown in FIG. 4 from the illustrated first position (position away from the disk). To the second position to support the outer peripheral portion of the disk 4. At this time, the second driving means continues to drive. The detailed operation of the second driving means constituted by the first rack 16 and the like will be described later.

  Next, as the second driving means is driven, the traverse base 5 starts to rotate in the direction of arrow F about the support shaft 5a from the recording / reproducing state shown in FIG. As the traverse base 5 rotates, the rib 5e rotates away from the rib 10b, so that the clamp holder 10 is rotated in the direction of arrow D by the elastic force of an elastic member (not shown). Move to the clamp standby position shown. At this time, the turntable 1 and the clamper 9 are separated from each other against the magnetic attractive force, and the disk 4 clamped and held by the turntable 1 and the clamper 9 is released from the holding state. Further, during the rotation of the traverse base 5, each centering member 8 a is rotated in the direction of arrow D, and the centering member 8 a is separated from the outer peripheral edge of the disk 4. As a result, the disk 4 is released and placed on the rib 3b of the tray 3 as shown in FIGS.

  The second driving means stops its operation when the centering member 8a is in the state shown in FIGS.

  In this embodiment, the clamp holder 10 is moved to the clamp standby position after the traverse base 5 is moved to the standby state. However, before the traverse base 5 is moved to the standby state, the clamp holder 10 is moved to the clamp standby position. The holder 10 may be moved to the clamp standby position. Further, the clamp holder 10 may be moved to the clamp standby position simultaneously with the movement of the traverse base 5 to the standby state.

  Next, in FIGS. 2 and 3, the motor 41 is driven and the tray 3 is pulled out from the disk device, and the tray 3 moves to the disk mounting position and stops as shown in FIG. Thereby, the user can take out the disk 4.

  When the tray 3 pulled out from the disk device stops at the disk loading position, the tray 3 or the cam portion that moves the tray 3 is stopped by pressing an electric switch (not shown) provided on the chassis 7. To do.

[2-2. Centering operation]
7 to 9 show plan views of the internal configuration of the disk device. FIG. 7 shows a state before centering, FIG. 8 shows a state during centering, and FIG. 9 shows a centering completed state. In each drawing, for convenience of explanation, drawing is omitted for some parts and members. In addition, some parts and members are drawn with temporary lines.

  In FIG. 7 to FIG. 9, the centering members 8 a to 8 d have been described as “centering member 8 a” in the above description, but in this description, different reference numerals are given to the four centering members. Explains. The centering members 8a to 8d are a first plane that includes the rotation center axis of the turntable 1 and the optical axis of the optical pickup 2, and a second plane that passes through the center of the turntable 1 and intersects the first plane at a substantially right angle. The disk 4 is abutted symmetrically with respect to the center. The first and second centering members 8a and 8b support the upper side of the disk 4 when the disk 4 is centered. The third and fourth centering members 8c and 8d support the lower side of the disk 4 when the disk 4 is centered. In the present embodiment, the centering member 8 supports the outer peripheral edge portion of the disk 4, but may support and transfer a portion other than the outer peripheral portion of the disk 4. Each centering member 8a to 8d has a first position where the disk 4 and the cartridge 19 are retracted so that the disk 4 and the cartridge 19 can be mounted on the disk mounting surface 3a as shown in FIG. 7, and as shown in FIG. Arrows are provided so that the disk 4 can be moved to the third position where the disk 4 is supported and moved to the centering position and to the second position where the disk 4 is clamped after centering as shown in FIG. It is configured to be rotatable in the A or D direction. In the present embodiment, the first position, the third position, and the second position are displaced in the order when the disc is loaded, and the second position, the third position, and the first position are ordered when the disc is ejected. Operates to displace.

  Further, gears 8f are provided at the ends of the centering members 8a to 8d, respectively. Since the gears 8f provided on the centering members 8a and 8c mesh with each other, and the gears 8f provided on the centering members 8b and 8d mesh with each other, the centering members 8a and 8c rotate at the same timing, The centering members 8b and 8d rotate at the same timing. Further, the mechanism inside the disk device is configured so that the centering members 8a to 8d rotate at the same timing.

  Each of the centering members 8a to 8d has a length that can scoop up the large-diameter disk or the small-diameter disk placed on the tray 3 when rotating.

  The springs 13a and 13b urge the centering members 8c and 8d in the centering direction indicated by the arrow A. The springs 13a and 13b are configured by coil springs in the present embodiment, but may be realized by other elastic members such as leaf springs as long as the centering members 8c and 8d can be biased in the centering direction. . In the present embodiment, the springs 13a and 13b are arranged so that the coil portions are substantially coaxial with the rotation centers of the centering members 8c and 8d. However, the springs 13a and 13b are arranged at the rotation centers of the centering members 8a and 8b. Also good. Moreover, you may distribute | arrange to each rotation center of centering member 8a-8d. Further, since the springs 13a and 13b are set to have the same spring rate so that the load applied by the spring 13a to the centering member 8c and the load applied by the spring 13b to the centering member 8d are the same, Can be centered. One end of each of the springs 13a and 13b is supported by a part of the front cover 3, and the other end is supported by a part of the centering members 8c and 8d.

  The centering adjustment members 14a and 14b are pivotally supported so as to be rotatable at positions coaxial with the centering members 8c and 8d or in the vicinity of the centering members 8c and 8d. Further, the centering adjusting members 14a and 14b are formed with a gear at one end, the gear of the centering adjusting member 14a meshes with the gear 8f of the centering member 8a, and the gear of the centering adjusting member 14b meshes with the gear 8f of the centering member 8b. . Further, since the centering adjusting members 14a and 14b are engaged with the centering members 8c and 8d biased in the arrow A direction by the springs 13a and 13b via the centering members 8a and 8b, they are biased in the arrow A direction. ing. Further, the first and second racks 16 and 17 (described later) are brought into contact with the other ends of the centering adjustment members 14a and 14b, whereby the centering adjustment members 14a and 14b are rotated in the direction of arrow A. Movement is regulated. This restricts the rotation of the centering members 8a and 8b, restricts the rotation of the centering members 8c and 8d engaged with the centering members 8a and 8b, and restricts the rotation of all the centering members 8a to 8d. Become. Therefore, the rotation of the centering members 8a to 8d can be controlled by controlling the rotation of the centering adjustment members 14a and 14b.

  The centering adjustment members 14 a and 14 b are disposed on the back side of the chassis 7. Therefore, the gears 8f of the centering members 8a and 8b that mesh with the gears of the centering adjustment members 14a and 14b in FIG. 7 are arranged so as to reach the back side of the chassis 7. The pitch circle diameter (PCD) of the gear provided on the centering adjustment members 14a and 14b is set to be larger than the pitch circle diameter of the gear 8f, thereby rotating the centering adjustment members 14a and 14b. When moved, the rotation amount of the centering members 8a to 8d can be made larger than the rotation amount of the centering adjustment members 14a and 14b. In the present embodiment, the pitch circle diameters of the centering adjustment members 14a and 14b are set to approximately twice the pitch circle diameter of the gear 8f, so that the rotation angles (rotation amounts) of the centering adjustment members 14a and 14b are set. ) Is half the rotation angle (rotation amount) of the centering members 8a to 8d, and the movement amounts of the racks 16 and 17 are also half.

  The first rack 16 and the second rack 17 are substantially perpendicular to each other with respect to a line passing through the center of the turntable 1 and the center of the optical pickup 2 (directions of arrows B and E in FIG. 7). ) To be movable at the same speed. The first rack 16 is positioned on the centering member 8c side as shown in FIG. 7 when the disk device is in a disk-mountable state, and its left end portion 16a abuts on the centering adjustment member 14a to adjust the centering. The rotation of the member 14a in the arrow A direction is restricted. The second rack 17 is located on the centering member 8d side as shown in FIG. 7 when the disk device is in a disk-mountable state, and its right end 17a abuts on the centering adjustment member 14b. The rotation of the centering adjustment member 14b in the direction of arrow A is restricted. The first rack 16 can be moved in the direction of arrow E by the driving force transmitted from the separately provided motor 30 (see FIG. 3) to the relay gear 31, and the second rack 17 can be moved in the direction of arrow B. It is configured to be movable to. The drive mechanism for the first rack 16 and the second rack 17 will be described later.

  In addition, since both the first rack 16 and the second rack 17 are engaged with the relay gear 31, the motor 30 can start driving, and thus both can start moving at the same timing. By simultaneously starting the movement of the first rack 16 and the second rack 17, the centering accuracy of the disk 4 can be improved. Furthermore, the centering accuracy can be further improved by setting the movement start timing at the same time and setting the movement speed to the same speed.

  Note that the driving force from the motor 30 may be configured to be transmitted to the first rack 16 and the second rack 17 independently of each other, but in the present embodiment, the first rack 16 and Teeth 16c and 17c are formed at opposite positions of the second rack 17, a relay gear 31 is provided that meshes with both teeth 16c and 17c, and the driving force from the drive source is transmitted to the relay gear 31, thereby relaying. Driving force is transmitted to the teeth 16c and 17c meshed with the gear 31, and the racks 16 and 17 can be moved in the directions of arrows B and E, which are opposed to each other, respectively.

  Further, the first rack 16 and the second rack 17 are in contact with the same portions of the centering adjustment members 14a and 14b as much as possible so that the centering members 8a and 8c and the centering members 8b and 8d rotate at the same timing. Configure.

  Further, the first rack 16 and the second rack 17 are arranged so as not to contact each other when the disk device is viewed from the front as shown in FIG. 3, and viewed from the side as shown in FIG. The arrangement at that time is arranged in the vertical direction.

  Although the holding of the first rack 16 and the second rack 17 is not illustrated, for example, cam grooves are provided along the longitudinal direction of the first rack 16 and the second rack 17 so that the cam is provided on the apparatus side. Although the structure which provides the pin engaged with a groove | channel and hold | maintains a rack slidably is considered, another structure may be sufficient.

  The operation will be described below. In this description, the operation of attaching and detaching a large-diameter disk having a diameter of 12 cm is described, but the same operation is performed even with a small-diameter disk (for example, a diameter of 8 cm).

  In the present embodiment, as described above, the configuration for positioning the disk 4 on the tray 3 is not provided, but the user places the disk 4 on the rib 3d of the tray 3 roughly. Therefore, the disc 4 inserted into the apparatus by the tray 3 has a high possibility that the center thereof is deviated from the center of the turntable 1 as shown in FIG. At this time, the centering members 8 a to 8 d are retracted so as not to overlap the projection surface of the disk placement surface 3 a of the tray 3. Further, the centering adjusting members 14a and 14b are in the positions shown in FIG. The left end 16a of the first rack 16 abuts on the centering adjustment member 14a, the right end 17a of the second rack 17 abuts on the centering adjustment member 14b, the centering adjustment members 14a and 14b, and the centering members 8a to 8d. Rotation in the direction of arrow A is restricted.

  Next, when a detection switch (not shown) detects that the tray 3 has been inserted into the apparatus or when a recording / reproduction start switch (not shown) is operated, the motor 30 starts to be driven. When the motor 30 is driven, the relay gear 31 connected to the motor 30 is rotationally driven, and the driving force is transmitted to the first rack 16 and the second rack 17.

  The first rack 16 starts to move in the direction of arrow E from the position shown in FIG. 7, and the second rack 17 starts to move in the direction of arrow B from the position shown in FIG. Then, the centering adjustment members 14a and 14b rotate in the direction of arrow A while being in contact with the racks 16 and 17 by the biasing force of the springs 13a and 13b. Accordingly, the centering members 8a and 8b engaged with the centering adjustment members 14a and 14b are rotated in the direction of arrow A about the support shaft 8e, and the centering members 8c and 8d engaged with the centering members 8a and 8b are supported. It is rotated in the direction of arrow A about the shaft 8e.

  The centering members 8a to 8d rotated with the movement of the first rack 16 and the second rack 17 eventually come into contact with the outer peripheral portion of the disk 4, and when further rotated, as shown in FIG. In addition, the disk 4 can be moved toward the center of the turntable 1 while the outer edge of the disk 4 slides on the disk contact portions of the centering members 8a to 8d.

  As shown in FIG. 8, when the disk 4 reaches the centering completion position (third position), the first to fourth centering members 8a to 8d move the edge of the disk 4 by the biasing force of the springs 13a and 13b. Stops in the pressed state. At this time, the centering members 8a to 8d are stopped in a state where the force is balanced in a state where the disk edge is pressed and supported.

  The first rack 16 and the second rack 17 continue to move in the directions of arrows B and E even if the centering members 8a to 8d support the edge of the disk 4. Since the centering members 8a and 8c are in contact with the edge of the disk 4, the rotation of the centering members 8a and 8c is restricted, and the rotation of the centering adjustment member 14a is also restricted. Therefore, as the first rack 16 continues to move in the direction of arrow E, the centering adjustment member 14a and the rack 16 are eventually separated. Further, since the centering members 8b and 8d are in contact with the edge of the disk 4, the rotation of the centering members 8b and 8d is restricted, and the rotation of the centering adjustment member 14b is restricted. Therefore, as the rack 17 continues to move in the direction of arrow B, the centering adjustment member 14b and the rack 17 are eventually separated.

  Next, the traverse base 5 is rotated about the support shaft 5a in the direction of arrow E (see FIG. 3), and the turntable 1 is moved to the recording / reproducing position through the opening 3b. As the traverse base 5 rotates, the clamp holder 10 rotates in the direction of arrow C (see FIG. 3). The detailed turning operation of the traverse base 5 will be described later.

  When the turntable 1 moves to the vicinity of the clamp position of the disk 4, the clamper 9 is attracted to the disk mounting surface of the turntable 1 by the magnetic force, and the disk 4 is clamped by the turntable 1 and the clamper 9. At this time, the first rack 16 and the second rack 17 continue to move in the directions of arrows B and E.

  When the movement of the first rack 16 and the second rack 17 is continued after the disk 4 is clamped, the right end portion 16b of the first rack 16 eventually comes into contact with the centering adjustment member 14b, and the second rack 16 The left end portion 17b of 17 contacts the centering adjustment member 14a.

  When the first rack 16 is further moved in the direction of arrow E and the second rack 17 is moved in the direction of arrow B, the first rack 16 presses the centering adjustment member 14b and the centering adjustment member 14b is moved in the direction of arrow D. Further, the second rack 17 presses the centering adjustment member 14a and the centering adjustment member 14a starts to rotate in the direction of arrow D.

  Accordingly, the turning force of the centering adjustment member 14a is transmitted to the centering members 8a and 8c via the gear, and the turning force of the centering adjustment member 14b is transmitted to the centering members 8b and 8d via the gear. As a result, as shown in FIG. 9, the centering members 8 a to 8 d are each rotated in the direction of arrow D and retracted to a position away from the edge of the disk 4. At this time, the disk 4 is clamped by the clamper 9 and the turntable 1.

  Next, the turntable 1 is rotated to rotate the disk 4, and an information signal can be recorded on or reproduced from the disk 4 by the optical pickup 2.

  Note that the retracted position of the first to fourth centering members 8a to 8d after being separated from the disk 4 is separated from the second position and the second position as long as it is separated from the outer periphery of the disk 4 placed on the turntable 1. You may retreat to any position between the three positions.

  The disk mounting operation is performed in the order of the centering operation and the traverse movement (clamping) operation. However, the order is not necessarily required, and the order may be changed as long as the disk 4 can be shifted to the clamped state. Good.

  Next, the operation for removing the disk 4 from the disk device will be described.

  As shown in FIG. 9, when a disc ejection switch (not shown) is operated while the disc 4 is in the recording / reproducing position, the rotation of the turntable 1 is stopped and the rotation of the disc 4 is stopped. . Next, the driving force output from the motor 30 (see FIG. 6) is transmitted to the first rack 16 and the second rack 17 via the relay gear 31.

  Next, the first rack 16 starts to move in the arrow B direction from the position shown in FIG. The second rack 17 starts to move in the direction of arrow E from the position shown in FIG. Accordingly, the centering adjustment member 14a is rotated in the direction of arrow A while being in contact with the rack 17 by the biasing force of the springs 13a and 13b, and the centering adjustment member 14b is in contact with the rack 16 while being in contact with the rack 16. It is rotated in the direction. Further, the centering members 8a to 8d meshing with the centering adjusting members 14a and 14b via gears are rotated in the direction of arrow A about the support shaft 8e.

  Next, as shown in FIG. 8, the centering members 8 a to 8 d are rotated from the second position (position separated from the disk 4) to the third position that supports the edge of the disk 4. Is supported by the urging force of the springs 13a and 13b. The racks 16 and 17 continue to move in the directions of arrows B and E even if the centering members 8a to 8d support the edge of the disk 4. When the racks 16 and 17 are moved to a predetermined position, the right end portion 16b of the first rack 16 and the centering adjustment member 14b are separated from each other, and the left end portion 17b of the second rack 17 and the centering adjustment member 14a are separated from each other. Separate.

  Next, the traverse base 5 is rotated in the direction of arrow F (see FIG. 6) about the support shaft 5a, and is moved from the clamp position to the standby position shown in FIG. Along with this, the clamp holder 10 is rotated in the direction of arrow D (see FIG. 6), and the turntable 1 and the clamper 9 are separated from each other against the magnetic attractive force. As a result, the clamped disc 4 is supported only by the centering members 8a to 8d as shown in FIG.

  Further, when the first rack 16 is moved in the arrow B direction and the second rack 17 is moved in the arrow E direction, as shown in FIG. 7, the left end portion 16a of the first rack 16 contacts the centering adjustment member 14a. The right end 17a of the second rack 17 comes into contact with the centering adjustment member 14b. When the first rack 16 is further moved in the arrow B direction after the contact, the centering adjustment member 14a pressed by the first rack 16 is rotated against the urging force of the spring 13a. The centering members 8a and 8c engaged with the centering adjustment member 14a are rotated in the direction of arrow D against the urging force of the springs 13a and 13b, respectively. Accordingly, the disk 4 slides down the disk contact surfaces of the centering members 8c and 8d and is placed on the rib 3c. When the first rack 16 and the second rack 17 reach the first position shown in FIG. 3, the motor 30 stops, the rotation of the relay gear 31 stops, and the first rack 16 and the second rack 17 stop. The movement of the rack 17 is stopped.

[2-3. Operation of traverse base 5]
10-12 is principal part sectional drawing which shows the moving mechanism of the traverse base 5, and is a cross section of the RR part in FIG. FIG. 10 shows a state in which the traverse base 5 is at the standby position and corresponds to the state shown in FIG. FIG. 11 shows a state where the traverse base 5 is moving. FIG. 12 shows a state at the recording / reproducing position, which corresponds to the state shown in FIG. For ease of explanation, only the configuration necessary for the explanation is shown.

  As shown in FIGS. 10 to 12, the second rack 17 has a plate portion arranged substantially perpendicular to the main plane of the chassis 7 (see, for example, FIG. 3), and the portion is substantially Z-shaped. Shaped cam grooves 17e and 17f are formed in parallel to each other. The cam groove 17e has flat portions 17g and 17m having different height positions at both ends, and an inclined portion 17h that spatially connects the flat portions 17g and 17m. The cam groove 17f has flat portions 17n and 17p having different height positions at both ends, and has an inclined portion 17k that spatially connects the flat portions 17n and 17p.

  Further, pins 5b and 5c are formed on the traverse base 5, and are movably fitted in cam grooves 17e and 17f, respectively.

  Moreover, the arrow G which is the moving direction of the 2nd rack 17 in FIGS. 10-12 points out the same direction as the arrow B in FIG.

  In the above configuration, in a state where the traverse base 5 is in the standby position shown in FIG. 10, the pin 5b is located at the flat portion 17g of the cam groove 17e, and the pin 5c is located at the flat portion 17n of the cam groove 17f.

  When the second rack 17 is moved in the direction of arrow G from the state shown in FIG. 10, the pins 5b and 5c move in the flat portions 17g and 17n in the cam grooves 17e and 17f, as shown in FIG. It moves into the inclined parts 17h and 17k. The pins 5b and 5c move in the inclined portions 17h and 17k, and the relative position with respect to the second rack 17 rises, so that the traverse base 5 is moved in the arrow H direction.

  Further, when the second rack 17 is moved in the direction of arrow G, the traverse base 5 is moved in the direction of arrow H, while the pins 5b and 5c are moved from the inclined portions 17h and 17k to the flat portion as shown in FIG. Move into 17m and 17p. When the pins 5b and 5c move into the flat portions 17m and 17p, the traverse base 5 is in the recording / reproducing position, and the turntable 1 is moved to a position where the disc can be clamped.

  Note that the movement of the traverse base 5 from the recording / reproducing position to the standby position can be realized by the reverse procedure of the above operation. That is, the traverse base 5 can be moved in the direction opposite to the arrow H by moving the second rack 17 from the position shown in FIG.

  Thus, the movement operation of the traverse base 5 and the movement operation of the second rack 17 are linked.

  Note that this apparatus can also mount a small-diameter disk. The small-diameter disk mounting operation is substantially the same as the above-described large-diameter disk mounting operation, but the rotation amount of the centering member 8a is different. Since the small-diameter disk is shorter in diameter than the large-diameter disk, a large amount of rotation is required when centering. In addition, the length and arrangement of the centering member 8a need to be optimized so as to hold the small-diameter disk placed on the rib 3b. The centering member 8a of the present embodiment has a length and an arrangement capable of holding both a large diameter disk and a small diameter disk. Detailed description of the operation is omitted.

  As described above, according to the first embodiment, the centering portion 8 that contacts the outer periphery of the disk 4 and moves the center of the disk 4 so as to match the center of the turntable 1 passes through the center of the turntable 1. A pair of or more than one pair of centering members 8a asymmetrically abutting the disk about a first plane perpendicular to the disk mounting surface of the turntable and provided on the chassis 7 on which the traverse base 5 is mounted, Is placed at a free position within a predetermined range on the tray 3, after the tray 3 is pulled into the disk device and stopped, the center of the disk 4 is aligned with the center of the turntable 1 by the centering portion 8. Therefore, it is not necessary to position and mount the disk 4 finely, and the mounting can be facilitated.

  In addition, according to the present embodiment, the first plane and the center of the turntable 1 pass through the center of the second plane that intersects the first plane at a substantially right angle so as to be in contact with the disk 4 symmetrically. By providing the configured centering member 8a, the disc is supported from four directions, so that the disc mounting range in which centering is possible is wide, and the degree of freedom of disc mounting can be increased.

  Further, since the support shaft 8e of the centering portion 8 is provided on the chassis 7, the mounting position accuracy of the centering portion 8 with respect to the turntable 1 can be made higher than the case where the centering means is provided in other portions such as the tray 3. Therefore, the centering accuracy of the disk 4 with respect to the turntable 1 can be increased.

  In addition, according to the present embodiment, the first plane is constituted by a plane including the optical axis of the optical pickup 2 and the central axis of the turntable 1. Since the centering member 8a is disposed symmetrically with respect to the path, the centering member 8a is less likely to interfere with the movement path of the optical pickup 2, the degree of freedom of the configuration of the centering member 8a is increased, and the rotation range of the centering member 8a is increased. Therefore, the disk mounting range that can be centered is widened, and the degree of freedom of disk mounting can be increased.

  Further, by providing the rib 3b on the disk mounting surface 3a of the tray 3, it is possible to prevent the disk 4 from being scratched on the surface facing the disk mounting surface 3a and to protect the disk 4. Further, since a gap is generated by the rib 3b between the disk 4 and the disk mounting surface 3a, the disk can be easily taken out from the apparatus, and the disk mounting surface 3a can be easily attached and detached with high flexibility. Have.

  Further, since the rib 3b is arranged in parallel with the moving direction of the optical pickup 2, the opening 3c provided in the disk mounting surface 3a is provided in parallel with the moving direction of the optical pickup 2, and therefore the opening 3c. Therefore, the rib 3b can be configured without being interrupted, and the effect of preventing the disc 4 from being damaged can be enhanced.

  In addition, although the rotation stop means of this Embodiment was based on mechanical means, such as a slip mechanism and a stopper, it may be based on electrical control.

  Further, although the gear is used as the rotation mechanism of the centering member 8a, the present invention is not limited to this, and other configurations may be used.

  Further, the centering member 8a is configured such that the paired members engage with each other and the gears are engaged with each other, and the respective centering members 8a are synchronously driven. It is good also as a structure driven by rotation.

  The present invention is not limited to the embodiment described above.

  The disk device according to the present invention is useful for a tray type disk device, and its application range includes, for example, a stationary disk player / recorder, an in-vehicle disk player / recorder, and a disk drive mounted on a personal computer.

The perspective view which shows the structure of the disk in Embodiment 1 of this invention. The perspective view of the disk apparatus in Embodiment 1 Sectional drawing of the disk apparatus in Embodiment 1 The perspective view of the disk apparatus in Embodiment 1 The perspective view of the disk apparatus in Embodiment 1 Sectional drawing of the disk apparatus in Embodiment 1 FIG. 3 is a plan view showing the internal configuration of the disk device in the first embodiment. FIG. 3 is a plan view showing the internal configuration of the disk device in the first embodiment. FIG. 3 is a plan view showing the internal configuration of the disk device in the first embodiment. Sectional drawing which shows the traverse base movement process of the disc apparatus in Embodiment 1 Sectional drawing which shows the traverse base movement process of the disc apparatus in Embodiment 1 Sectional drawing which shows the traverse base movement process of the disc apparatus in Embodiment 1

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Turntable 2 Optical pick-up 3 Tray 3a Disc mounting surface 3b Rib 3c Opening 4 Disc 5 Traverse base 5a Support shaft 7 Chassis 8 Centering means 8a, 8b, 8c, 8d Centering member 8e Support shaft 9 Clamper 10 Clamp holder 10a Support axis

Claims (5)

A disc device capable of recording or reproducing an information signal with respect to a disc,
A disk mounting portion on which the disk can be mounted; the disk mounting portion where the disk mounting portion is located outside the device; and the disk mounting portion located in the device and on the disk mounting portion A tray that is movable between a disc clamping position where the placed disc can be clamped;
An optical pickup for recording / reproducing an information signal with respect to the disc; and a turntable for rotating the disc at a position where the disc is mounted and the optical pickup can record and reproduce an information signal with respect to the disc. A traverse base mounted and arranged to be movable between a recording / playback position and a standby position;
A chassis that includes an opening in which the traverse base is contained, and that supports the traverse base so as to be movable in the opening;
A centering member for holding and transferring the disk to a position where the center of the disk and the center of the turntable coincide with each other;
The centering member passes through the center of the turntable and passes through a first plane that intersects the disk mounting surface of the turntable at a right angle and a second plane that passes through the center of the turntable and intersects the first plane at a substantially right angle. A pair of symmetrically about the first plane, and a pair of symmetrically rotating about the second plane, respectively.
The tray is provided with ribs protruding in the vertical direction on the disk mounting portion, and the vertical height of the ribs is low near the turntable in a state where the tray is at the disk clamp position. A disk device characterized by being formed so as to gradually increase from the vicinity of the turntable toward the outer side in the disk radial direction. The centering means is composed of a centering member configured to contact the disc symmetrically about the second plane passing through the center of the first plane and the turntable and intersecting the first plane at a substantially right angle,
2. The disk device according to claim 1, wherein the centering member is provided in a pair symmetrically about the first plane, and is configured to rotate symmetrically about the second plane.   The disk device according to claim 1, wherein the first plane is a plane including an optical axis of the optical pickup and a center axis of the turntable.   The disk device according to claim 1, wherein the rib is disposed in parallel to a moving direction of the optical pickup. A clamper attracted to the turntable across the disk;
It is composed of a substantially plate-like member, and is arranged so as to be rotatable so that the clamper can be loosely fitted in the vicinity of one end, and the clamper can be displaced between a position where it can be adsorbed to the turntable and a position where it is separated. And a clamp holder
The clamp holder is provided with a first rib projecting in the direction in which the traverse base is arranged on the other end side,
The traverse base includes a second rib that can come into contact with the first rib when the traverse base is at a recording / reproducing position;
When the traverse base moves from the standby position to the recording / reproducing position, the second rib presses the first rib to rotate the clamp holder, and the clamper and the clamp at the recording / reproducing position The disk device according to claim 1, wherein the turntable is adsorbed.

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